Transcript suspenion system - Free Downalod Project,Study Material

(CUSHION FOR PASSENGERS)
INTRODUCTION
 Suspension system is the term given to the system of
springs, shock absorbers and linkages that connects a
vehicle to its wheels . It is basically cushion for
passengers protects the luggage or any cargo and also
itself from damage and wear.
 Sir William Brush is the father of suspension system in
automobiles.
ROLE OF SUSPENSION
SYSTEM
The main role of suspension system are as follows:
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It supports the weight of vehicle .
Provides smoother ride for the driver and passengers i.e. acts as
cushion.
Protects your vehicle from damage and wear .
It also plays a critical role in maintaining self driving conditions.
It also keeps the wheels pressed firmly to the ground for traction .
It isolates the body from road shocks and vibrations which would
otherwise be transferred to the passengers and load.
PRINCIPLE OF SUSPENSION
Principle :-When a tire hits an obstruction, there is a
reaction force. The size of this reaction force depends on the
unsprung mass at each wheel assembly.
In general, the larger the ratio of sprung weight to
unsprung weight, the less the body and vehicle occupants
are affected by bumps, dips, and other surface imperfections
such as small bridges. A large sprung weight to unsprung
weight ratio can also impact vehicle control.
DEFINITIONS OF
SPRUNG &UNSPRUNG MASS
 Sprung mass :-Sprung mass (weight) refers to vehicle
parts supported on the suspension system, such as the
body, frame, engine, the internal
components, passengers, and cargo.
 Unsprung mass :- Unsprung mass
refers to the components that follow
the road contours, such as wheels, tires,brake assemblies,
and any part of the steering and suspension not supported by
the springs.
WORKING OF SUSPENSION
SYSTEM
No road is perfectly flat i.e. without irregularities. Even a freshly
paved highways have subtle imperfections that can be interact
with vehicle’s wheels. These are the imperfections that apply
forces on wheels.
According to Newton ‘s law of motion all forces have
both magnitude and direction.
A bump in the road causes the wheel to move up and
down perpendicular to the road surface. The magnitude of
course ,depends on whether the wheel is striking a giant
bump or a tiny speck. Thus, either the wheel experiences a
vertical acceleration as it passes over an imperfection.
The below figure shows Horizontal/Vertical Acceleration:
PARTS OF TYPICAL
SUSPENSION
The suspension of a car is actually part of the chassis,
which comprises all of the important systems located
beneath the car's body. These system include :
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Frame
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Suspension system
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Steering system
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Tires or Wheels
The basic components of car suspension system
shown by figure :
COMPONENTS OF ANY
SUSPENSION
There are three fundamental components of any
suspension system .
 Springs
 Dampers
 Anti sway bars
SPRINGS
 Coil spring
 Leaf springs
 Air springs
DAMPERS
Three types: Shock Absorbers:-
•
Struts:-
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Anti-sway Bars:- Anti-sway
bars (also known as antiroll bars) are used along
with shock absorbers or
struts to give a moving
automobile
additional
stability. An anti-sway bar
is a metal rod that spans
the entire axle and
effectively joins each side
of
the
suspension
together.
TYPES OF SUSPENSION
FRONT
INDEPENDENT
NON
INDEPENDENT
REAR
INDEPENDENT
NON
INDEPENDENT
FIGURES SHOW DIFFERENCE BETWEEN
INDEPENDENT AND NON INDEPENDENT
SUSPENSIONS
ADVANTAGES
 Comfort to passengers
 Good handling
 Shields the vehicle from damage
 Increases life of vehicle
 Keeps the tires pressed firmly to ground
SPECIALISED SUSPENSIONS
FORMULA ONE
•
MULTI –LINK
SUSPENSION
MORDERN TECHNOLOGY
 Hydraulic fluid and air suspension
 Electronic and active suspensions
CONCLUSION
 From the whole discussion in suspension system, I observe that
suspension system is like a white blood cell .As white blood cell
provides energy to our body to fight against diseases or viruses
which try to destroy or try to decrease our life ,in the similar way
suspension system provides the energy to a vehicle to protect
itself from damaging, increasing life of the vehicle ,increases the
handing,increases comfort of passengers and many more.
 So, according to me if you remove the suspension system, then
you feel like in bull- cart in Audi , Mercedes types luxurious cars.
The only difference is speed.
 So, the scope of Suspension System is Too Bright.
THANKS